Jun Gong created YARN-3161:

             Summary: Containers' information are lost in some cases when RM 
                 Key: YARN-3161
                 URL: https://issues.apache.org/jira/browse/YARN-3161
             Project: Hadoop YARN
          Issue Type: Bug
          Components: resourcemanager
    Affects Versions: 2.6.0
            Reporter: Jun Gong

When RM restart, containers' information will be lost for the following 
1. NM restarts before it sends containers' information to the new active RM. 
2. NM stops and it could send containers' information to the new active RM.

Without those containers' information, corresponding AM will never get their 
status through RM, and AM could just wait them for ever.

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